State Key Laboratory of Chemical Oncogenomics;
Key Laboratory of Chemical Biology;
the Graduate School at Shenzhen;
Tsinghua University;
Shenzhen 518055;
China;
Department of Chemistry;
Tsinghua University;
Beijing 100084;
China;
Department of Pharmacology and Pharmaceutical Sciences;
School of Medicine;
Tsinghua University;
Beijing 100084;
China;
Aptasensor; ExonucleaseⅢ-aided recycling; amplification; G-quadruplex; Magnetic beads; MUC1;